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About our products: Pistons

Pistons are manufactured
with a diameter range
from 76 mm to 150 mm

Pistons for engines used in Russian and foreign passenger cars and commercial vehicles, tractors and combines, buses and special purpose equipment.

The pistons are produced with the most modern equipment: Takisawa, GFS, Otto Harrandt, etc., which provides dimensional stability and geometric accuracy of the parts.

Each product passes through a multilevel quality control: from alloy composition to geometric parameters. The Motordetal pistons have earned their favorable reputation and have been selected by many carmakers and customers.

Piston types
Monoblock piston

This piston weighs less than the other pistons and for this reason it is more preferable when choosing the piston shape.

Piston with ring belt

The special insert ensures dimensional and geometric stability of the piston when heating (allows the clearance reduction between the piston and the cylinder which leads to the engine noise minimization).

Piston with ring carrier

This design ensures durability of the most stressed part of the piston — the upper compression ring groove.

Piston with cooling gallery

Initially it was intended for high-forced diesel engines. Nowadays it is used also in supercharged gasoline engines. The piston design ensures the most effective piston crown cooling.

Piston design types
The Motordetal piston production
  • All the pistons are produced using the mold casting method which ensures the material structure of high quality. Impurities are removed and mechanical properties of metal are distributed uniformly across the entire part.
  • For the piston production we use aluminium alloys with various alloying elements. It is necessary to ensure the required properties of each piston type.

For continuous and failure-free production of the Motordetal pistons we use multicomponent aluminium-silicon alloys (silumins): AlSi18, AlSi13Cu5MgNi2, AlSi21Cu3Ni1, AlSi12CuMgNi (AL30), AlSi13Cu3MgNi2 — 5 alloys, mixed with chromium, magnesium, copper, nickel and other elements.
It should be noted that many manufacturers use AlSi8, AlSi9, etc., (the number in the name of the alloy means a percentage of silicon) silumins as a basic alloy.
The Motordetal pistons are manufactured with the alloys of high quality. The basic alloy is AlSi12CuMgNi (Al30), containing 12% of silicon.

The table of the alloys used for production at Motordetal
АК12ММгН The basic alloy. AlSi12CuMgNi (AL30) has a composition of such optimum properties as wear-resistance, high temperature strength, high thermal conductivity.
АК13М3МгН2 The alloy has similar properties as AlSi12CuMgNi (AL30) but differs in a high percentage of copper and nickel. The piston made of this kind of alloys is stronger, more heat-resistant, burn-through-resistant and thermal conductive.
АК13М5МгН2 This alloy is the strongest among the alloys of this type. The alloy has simillar properties as AlSi12CuMgNi (AL30), but differs in a higher percentage of copper. Due to this the pistons made of this alloy are super strong.
АК18 The basic hypereutectic alloy. It is heat-resistant and has high hardness. Due to its wear-resistance it is optimal for production of truck and tractor diesel engines. It has a low thermal expansion coefficient.
АК21М3Н1 This alloy has all properties of AlSi18 alloy. Due to a higher percentage of copper and nickel it differs in increased strength and thermal conductivity. A low thermal expansion coefficient allows the clearance reduction between the piston and the cylinder.
Eutectic alloy — an alloy where main (aluminium) and alloying (silicon) elements are in balance.
Hypereutectic alloy — an alloy where the alloying elements are overbalanced compared to the eutectic alloyp.

The piston castings are heat-treated for stress relief (the piston material becomes more ductile and elastic).

The pistons are machined on automated lines ensuring stability of properties and parameters (outer surface form, combustion chamber, etc.) of each piston in the mass production.

After special machining the surfaces of the Motordetal pistons get a microrelief. It minimizes friction losses between the piston and the cylinder (and as a result it extends service life and reduces fuel consumption).

On the surfaces of the Motordetal pistons we apply an innovative antifriction coating, called NANOFRIKS. It allows reducing friction losses and helps when lubrication is poor: during the engine starting and reduction of the engine oil viscosity. Nanofriks extends service life of the piston and as a result of the engine too.

The pistons are phosphated and for this reason the surface becomes more harder, wear-resistant and corrosion-resistant.

The crown and the upper compression ring groove of the pistons used in the modern passenger car engines are anodized.
Anodizing makes the piston material stronger, harder, more heat-resistant and increases wear-resistance of the piston ring groove. Furthermore due to the optimal piston ring operation the service life of the piston extends.

Piston markings